what the hell is a nug i keep hearin people say it but i dunno what it means. im good on most other words its just this one i got trouble with.
1 Improper use of contact lenses or steroid eyedrops can lead to fungal infections, which in turn can cause corneal ulcers. Also, a corneal injury that results in plant material getting into the eye can lead to fungal keratitis.  Acanthamoeba are microscopic, single-celled amoeba that can cause human infection.
Following is a list of causes or underlying conditions (see also Misdiagnosis of underlying causes of Corneal ulcer) that could possibly cause Corneal ulcer includes: 1  Herpes simplex. 2  Shingles.  Eye injury.